Catherine T.Zeng (Kate)


Silicon Valley + 1.650.687.4132

Kate Zeng litigates complex cases with a focus on antitrust and unfair competition, class actions, product liability, and commercial disputes. She has represented companies in many industries, including the technology, education, health care, consumer products, nonprofit, and energy sectors. She has a broad range of experience in all aspects of litigation, including large-scale discovery, motion practice, working with experts and consultants, and trial.

Some of Kate's recent matters involve defending a health care client against multiple lawsuits alleging unfair competition claims, the successful dismissal of a lawsuit against a large energy company, and representing two technology companies in an antitrust class action. Kate also spent a year in Jones Day's Shanghai Office, where she worked extensively on internal investigations, antitrust, international litigation, and Federal Corrupt Practices Act (FCPA) matters.

Kate maintains an active pro bono practice. Most recently, she helped an unaccompanied minor obtain Special Immigrant Juvenile Status. She also has represented pro bono clients in unlawful detainer, conservatorship, and domestic violence matters.


  • Adobe Systems resolves recruiting antitrust litigationJones Day client Adobe Systems Inc. reached a settlement agreement resolving a nationwide antitrust class action brought by current and former employees of Adobe, Apple, Google, Intel, Intuit, Lucasfilm or Pixar alleging conspiracy to fix and suppress employee compensation by entering into non-solicitation agreements.
  • TMC HealthCare defends temporary nurses' antitrust class actionJones Day successfully defended TMC HealthCare in connection with an antitrust class action alleging a conspiracy to depress the wages paid to temporary nurses.
  • Lam Research defends claims of aiding and abetting breach of fiduciary duty in connection with acquisition of Novellus SystemsJones Day represented Lam Research Corporation in the defense of state and federal court complaints claiming that it aided and abetted alleged breaches of fiduciary duty by the directors of Novellus Systems, Inc. in connection with Lam Research's $3.3 billion acquisition of Novellus.
  • SAP AG and SAP America defend claims of aiding and abetting breach of fiduciary duty in connection with acquisition of SuccessFactorsJones Day represented SAP AG and SAP America, Inc., in defense of claims that SAP aided and abetted breaches of fiduciary duty by the directors of SuccessFactors in connection with SAP's $3.4 billion acquisition of SuccessFactors, Inc.
  • Monolithic Power Systems and directors defeat derivative claims for breach of fiduciary dutyJones Day represented Monolithic Power Systems, Inc. and its directors in the successful defense of derivative claims for breach of fiduciary duty arising out of a negative shareholder vote on the company's "say on pay" proposal.
  • SunPower and Total partner to create new global leader in solar industry with $1.4 billion tender offerJones Day advised SunPower Corporation in the completion of the $1.4 billion tender offer by Total for up to 60% of SunPower's outstanding Class A Common Shares and 60% of SunPower's outstanding Class B Common Shares at a price of $23.25/share for each class.
  • Texas Instruments defends claims of breach of fiduciary duties in connection with $6.5 billion acquisition of National SemiconductorJones Day represented Texas Instruments Incorporated in defense of claims that it had aided and abetted breaches of fiduciary duties by the directors of National Semiconductor Corporation in connection with Texas Instruments' $6.5 billion acquisition of National.
  • Yamaha prevails in jury trial involving Rhino SxS vehicleAfter a three month trial in the Orange County Superior Court, Complex Division, a jury returned a defense verdict on behalf of Jones Day client Yamaha Motor Co. in a "bellwether" case involving the Yamaha Rhino SxS vehicle.
  • Indigent tenants in Los Angeles receive assistance through the Bet Tzedek Unlawful Detainer Trial ProjectJones Day Los Angeles is working with Bet Tzedek, the House of Justice, to provide a valuable service to low-income families and individuals in need.